2026 Transition Bikes Spire Alloy Eagle 90

Frame & fit interfaces

The standards that decide what fits this bike.

Wheel size

29"

Suspension

Full

Rear travel

170 mm

Rear axle spacing

148 mm

Seatpost diameter

31.60 mm

Headset standard

56mm Zero Stack

Bottom bracket

73mm BSA Threaded

Max tire size

29 x 2.6

Stock build

• ForkRockShox ZEB Ultimate B1, Linear XL w/ ButterCups, Charger 3.2 RC2 damper, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 170mm travel
• StemBurgtec Enduro MK3 35 (35mm)
• ChainSRAM GX Eagle Transmission
• GripsODI Longneck V2.1 Lock On
• SaddleSDG Bel Air 3
• HeadsetFSA NO.55R/57
• CassetteSRAM XS-1275 Eagle Transmission Cassette
• CranksetSRAM Eagle 90 DUB (30t/165mm)
• SeatpostOneUp Dropper Post SM(150mm) MD(180mm) LG/XL(210mm)
• ShiftersSRAM Eagle 90 MMX
• HandlebarBurgtec Ride Wide Alloy Enduro SM(780x20mm) MD(780x30mm) LG/XL(800x38mm)
• Rear TireSchwalbe Albert Radial, Gravity Pro, Soft (2.5)
• Front TireSchwalbe Magic Mary Radial, Trail Pro, Ultra Soft (2.5)
• Rear BrakeSRAM Maven Bronze
• Rear ShockRockShox Super Deluxe Ultimate (205x65mm)
• Rear WheelDT Swiss 370 Ratchet LN
• Front BrakeSRAM Maven Bronze
• Front WheelDT Swiss 370 Ratchet LN
• Rear DerailleurSRAM Eagle 90
• Rear Brake RotorSRAM Centerline (200mm)
• Front Brake RotorSRAM Centerline (200mm)